The Two Spotted Spider Mite in the Northeast Hopyard
www.uvm.edu
The two spotted spider mite (TSSM) Tetranychus urticae Koch is a common pest of many crops and ornamentals. Hop
growers, landscapers, arborists, and vegetable and fruit growers are familiar with these small 8 -legged creatures that
are more closely related to spiders than insects. They can be a major cause of ...
www.uvm.edu
The two spotted spider mite (TSSM) Tetranychus urticae Koch is a common pest of many crops and ornamentals. Hop
growers, landscapers, arborists, and vegetable and fruit growers are familiar with these small 8 -legged creatures that
are more closely related to spiders than insects. They can be a major cause of ...
Grower Notes: Low levels of spidermites are being reported by several growers. So far the cool wet weather has kept them in check - watch out if the weather goes hot & dry!
Also, powdery mildew has been seen on weeds around the hop yards; so conditions are right for it to form - scout the lower leaves for visual symptoms. Many varieties of hops are entering the burr stage and burrs infect easily during wet humid weather. An effective protectant fungicide for burr stage is Quintec. Apply it as a preventative if the wet weather continues during cone formation and you have seen foliar symptoms.
The crop in Northern Michigan appears to be running about two weeks behind the Southern Michigan hop yards - so adjust accordingly.
Also, powdery mildew has been seen on weeds around the hop yards; so conditions are right for it to form - scout the lower leaves for visual symptoms. Many varieties of hops are entering the burr stage and burrs infect easily during wet humid weather. An effective protectant fungicide for burr stage is Quintec. Apply it as a preventative if the wet weather continues during cone formation and you have seen foliar symptoms.
The crop in Northern Michigan appears to be running about two weeks behind the Southern Michigan hop yards - so adjust accordingly.
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